#include <iostream>
#include <string>
#include<fstream>

using namespace std;

int main () {
	ifstream in(__FILE__);
	in.seekg(-30, ios::end);
	string line;
	in >> line;
	cout << in.rdbuf();
	cout << line;

	
	char buf[20] = {'a', 0, 'b', 'c'};
	cout << endl;
	string str(buf,20);
	cout <<"string size = " << str.size() << endl;
	cout << "string = " << str<< endl;
	return 0;

}
